Effects of exercise on Respiratory system are :

1. The muscle cells in the body will use up more oxygen and produce more Carbon-dioxide. 

2. The lungs will have to work harder to provide Oxygen and also to remove carbon-dioxide. Hence there will be an expansion in the volume and efficiency of the lungs. 

3. There will be an increase in the breathing rate as the body will be trying hard to get as much oxygen as possible and to minimize the amount of oxygen debt.

4. The muscles of the respiratory system such as diaphragm and the intercoastal muscles get stronger. 

5. Breathing after exercise becomes lighter and slower due to an adaptation of the respiratory system and the breathing centre.

6. As a result the body oxygen content increases after many hours after the exercise. 

7. As a response to exercise the diaphragm contracts leaving place for the lungs to expand. Consequently we inhale more deeply allowing more oxygen to enter the lungs. 

8. The heart and the cardiovascular system respond by pumping out more oxygenated blood to the working muscles during exercise.